'ERROR: KVM does not support NYX_PT (0)!'

littleQ — Wed, 11 Jun 2025 03:06:15 GMT

Hello, I am a student interested in fuzzing TDX guest. Recently, I ran the fuzz program in ccc-linux-guest-hardening https://github.com/intel/ccc-linux-guest-hardening. But I met some problems:

After I installed the host kernel (https://github.com/IntelLabs/kafl.linux/tree/kafl/sdv-6.1-3 ), I ran make deploy in the ccc-linux-guest-hardening directory and got the following error:

```
TASK [intellabs.kafl.kernel : Run support_test] ********************************
fatal: [localhost]: FAILED! => changed=false
cmd:
- /tmp/ansible.rwfgzqb2/support_test
delta: '0:00:00.001852'
end: '2025-06-10 16:46:53.441049'
msg: non-zero return code
rc: 2
start: '2025-06-10 16:46:53.439197'
stderr: ''
stderr_lines: <omitted>
stdout: 'ERROR: KVM does not support NYX_PT (0)!'
stdout_lines: <omitted>
...ignoring
```

But when I ran support-test (https://github.com/IntelLabs/kAFL/blob/master/deploy/intellabs/kafl/roles/kernel/files/support_test.c), I got the following output.

```
# ./support_test
KVM-PT is ready!
# echo -n "Intel PT support: "; if $(grep -q "intel_pt" /proc/cpuinfo); then echo ""; else echo ""; fi
Intel PT support:
```

Could you please help me solve this issue?I would appreciate your assistance.

topic 'ERROR: KVM does not support NYX_PT (0)!' in Software Tuning, Performance Optimization & Platform Monitoring

'ERROR: KVM does not support NYX_PT (0)!'